Island



(No Model.)

G. W. MILLER. CLOTH STRETGHING ROLL.

N0. 392,051. Patented 001;. 30, 1888.

III]! III r4. PETERS, Phmo-Lnnogmphur. Wash ngton, 0.0.

GEORGE W. MILLER, OF WOONSOGKET, RHODE ISLAND.

CLOTH-STRETCHING ROLL.

SPECIFICATION forming part of Letters Patent No. 392,051, dated October 30, 1888.

Application filed February 16. 1888. Serial No. 264,190. (No model.)

To aZZ whom it may concern:

Be it known that l, GEORGE W. MILLER, a citizen of the UnitedStates, residing at W0onsocket, in the county of Providence and State of Rhode Island, have made certain new and useful Improvements in Cloth Stretching Rolls, of which the following is a specification.

My invention relates to rolls for stretching cloth; and myimproved stretcher-roll consists of a shaft carrying circular cams having faces coinciding with converging planes, means for adjusting the cams, and rotating supports for two or more series of stretcher-bars capable of longitudinal movement on said supports and traveling between the faces of the cams, as fully set forth hereinafter, and as illustrated in the accompanying drawings, in which Figure l is a side elevation of my improved stretcher-roll; Fig. 2, a section on the line 1 2, Fig. 1; Fig. 3, a sectional view illustrating a different connection between the stretcher-bar and its support from that shown in the other figures; Fig. 4, a side view illustrating the arrangement of cams and bars when more than two series of SDIGtCllBPbZLIS are employed. Fig. 5 is a part longitudinal section, and Fig. 6 an end view, of a part of a stretcher differing slightly in construction from that shown in the other figures.

My improved cloth-stretching roll consists, essentially, of a shaft, A,which is secured adjustably in bearings B B, but which may be turned therein to any desired extent and then fixed for the purpose of regulati ng the extent of the stretching action byscrews e,aseries of disks or circular supports, F, turning freely upon the shaft A and arranged in pairs, each pair carrying a series of parallel sliding bars, 0, serrated or provided with pins for engaging with the cloth, and a series of circular cams, D D, secured to the shaft A and adjustable therewith.

The supports F revolve upon the shaft A be tween collars a a, so that they cannot move laterally, and the bars 0 are connected thereto,so that the said bars may slide longitudinally while being otherwise retained by the said supports. Different connections for the bars may be employed. For instance, the supports F, in the form of disks, may have dovetailed recesses e, as shown in Fig. 2, and the bars 0 may be formed to fit the said recesses and slide longitudinally therein or each bar may be provided with an elongated eye or staple, b,which passes through a transverse slot in the adjacent supporting-disk F, as shown in Fig. 3.

The central cam, D, has two flat sides coinciding with converging planes, and the end cams, D D, have each, asshown in Fig. 1, a flat face in a plane parallel to the opposing face of the central cam, D.

The shaftAis mounted in its bearings upon a cloth-pressing or other like machine in the same position as stretchers are ordinarily arranged, and a hand-wheel or other adjusting device, G, is secured to theend of the shaft,so as to perwit it, with its cams, to be turned to the desired position, after which the shaft is fastened by means of the set-screw i, or other suitable retaining device.

The cloth to be stretched is laid upon the stretching-roll, and is drawn forward in the direction of the arrow, Fig. 2, causing the revolution of the supports and the bars carried thereby round the shaftA, and, as the ends of the bars will travel in the planes of the camfaces,the two series of bars are gradually separated as they travel from the bottom toward the top of the roll, thereby stretching the cloth laid upon the same and with which they travel. The cloth (indicated by the line 00, Fig. 2) is conducted over a portion of the periphery of the stretching-roll, first meeting the roll at one point and leaving the roll at another where the bars are farther apart, the extent to which the said bars are separated at the contact-points with the cloth by the action of the cams determining the extent to which the cloth is stretched by the said bars. The extent of the stretching action may be readily regulated by adjusting the shaft A and its cams D D. Thus, by bringing the widest portion of the cams D D to the point y, where the cloth leaves the cylinder, the greatest amount of stretching action is secured, while by setting the cams so that the portion indicated by the line 1) coincides with the point 3/ the extent of the stretching action is reduced.

Instead of two sets of bars and operatingcams, four or more sets of bars may be employed, and the cams for operating the set nearest the ends of the roll may be constructed to impart agreater movement to the bars which operate upon the cloth nearest its edge, thereby securing an increased travel of the bars from the center to the edges of the cloth. Such an arrangement is indicated in Fig. 4, where it will be seen that the bars are thrown outward only by the action of the cam-faces,the inward movement being effected by means of springs, as shown at to.

In Figs. 1 to 4 the bars are shown as separated, as they can be so used in some cases. It is preferable, however, to place them close together, forming practically a closed cylinder consisting of contiguous longitudinallymovable stretching-bars, as shown in Figs. 5 and 6. In this form of stretcher the bars G,of wood,are provided with metal guides b, fitting openings in the disks F.

Without limiting myself to the precise construction and arrangements of parts shown, I claim- The combination, in a stretcher-roller, of bearings, a shaft seated therein, means for adjusting the shaft in the bearings, cams D D, secured to the shaft, means, as described, for turning the shaft to adjust the cams, and supporting-disks rotating freely upon the shaft and carrying stretcher-bars sliding longitudinally upon the supports between the faces of 0 the cams, substantially as and for the purpose set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

GEORGE W. MILLER.

Witnesses:

L. W. BALLOU, CHAS. E. BALLOU. 

